AP BIOLOGY

Detailed explanation-1: -Transpiration is the loss of water in the form of vapour through aerial parts of the plant. This creates a suctional force pulling water from the roots through the xylem. Transpiration helps to pull water to the leaves of tall trees that are even 600ft high.

Detailed explanation-2: -As transpiration occurs, it deepens the meniscus of water in the leaf, creating negative pressure (also called tension or suction). The tension created by transpiration “pulls” water in the plant xylem, drawing the water upward in much the same way that you draw water upward when you suck on a straw.

Detailed explanation-3: -Plant stems have some very special cells called xylem. These cells form long thin tubes that run from the roots up the stems to the leaves. Their job is to carry water upward from the roots to every part of a plant.

Detailed explanation-4: -Transpiration helps in maintaining the concentration of the sap inside the plant body: The roots continue to absorb water from the soil. If excess water is not evaporated out, the sap would then become dilute, preventing further absorption of water and minerals.

Detailed explanation-5: -Water moves from the roots to the leaves through tissue called the xylem, in a process called transpiration. As water evaporates out of the leaf, more water is ‘pulled upwards’ to replace what has been lost.